Professional Classic® with Demand Response high efficiency electric water heaters are engineered for longer life and connection to utility demand response programs for energy savings.Efficiency.92 - .93 UEFDual 4500 and 5500 watt copper heating elementsPerformanceFHR: 51 - 72 gallons, based on gallon capacityRecovery: 17 to 21 GPH at a 90° F rise, depending on modelLonger LifePremium grade anode rod provides long-lasting tank protectionFeaturesUser friendly interface on unit to easily adjust set temperatureError code functionality triggers an audio alert to help prevent potential water heater downtimeOffers self-diagnostic control systems with LED lights indicating service is neededDemand response ready EcoPort (CTA-2045 port) is built in for easy connect to utility demand response programsHigh performance and lower operating costElectric junction box located above heating elements for easy installationOver-temperature protector cuts off power in excess temperature situationsEasy to Install and ServiceDurable brass drain valve helps drain the tank faster to reduce time on the jobPlus…EverKleen® self cleaning device fights harmful sediment build-up with a high-velocity spiraling water stream – helps operating efficiency by saving energy, money and improving tank life